Automatic hammer.



C. S. BODEN.

AUTOMATIC HAMMER.

APPLICATION man JUNE 17, Isls.

1 162,678. Patented Nov. 30, 1915.

3 5\ 34 36\ /6 Z71'/ L' 1 2G f 1 .4 /7 y 25 f 3 INVENTOR. WITNESSES.- 7 C 5 5005A/ 7W BY M /D v [y ATTORNEYS. /r' 5. Pbdwz( 'cLARnncEs nonmon SAN AUTOMATIC 11A-Minna FRAN" cIscdcA-LIF-onN'IA,AssreNoa 'rfiepnmrs "Acronimo italien-mamy mem:

a citizen ofthe UnitedStates, and a resident of the city and county -of Sanl Fgran'cislco,- have v'inven`ted'-1 certain new and useful Improvements-in Automatic'- ofwhich the following is -aspeci-1` State of California,

Hammers, fication.

The invention relates tools -andparticularly to hand tools for. supplyingand drivingtacks, nails or other fastenings one.- ma be A I j curved as shown. n The head 5 may be ofyany A formed of -suiiicient` weightso thatth'e 'impact ofthe blow is sufficient' to drive the' at a time.

The object of the inventionxis to provide a simple and efiicient'automatic swlng ham# or'nails to be driven.

. 1. Fig.v 7 ofthe handleshowing the lock operating' Fig. 1.- .F siteJside vvofthe head of the-hammer from that shown in Figil Fig. 5 is aperspective l View of the tack locking provide an automatic swing hammer- *in which the direction ofthe blow .is always alined with the nail or tack belng driven..

The invention possesses other advantageous features, which, with the foregoing, will be set forth-at length inthe following descriptiomwhere I shall outline in full that .formof the invention Which'I have selected scope of my invention as forth in said" claims.

. Referring tenia' drawings rigiire' 1.A ie' e" 4b sideelevationof one v:fornif-of the hammer of myl invention. Fig.. 2 is a sectionon a larger scale taken" on the line 24-2 Fig. 1.A Fig. l3 is a' section taken on the line 3-3 ig. .4 is an elevation of the oppomeans removed from the hammer.v Fig. 6 1s a cross sectional detail ofthe head taken on the line 6- 6 Fig. is an under View of a` frag1nent means.

It is to be understood that I do not limitv myself to the use of shapes of tacks, nailst'or other fasteningsg since such will be suited to the particular use particular styles 4or Another object of the inventiony vide an improved means offeeding the .tacks F A further object of the, inven'tlon v1s to.'

into which the nail is being momentum of the head causes the driver 12 'to drive the nailv into lthe material. In swinging the hammer, the stantially inan arc about a center located on :oradjacent the handle, mannerin which the handle is f materlal,

i :move 'inap i .toftoollis to I". Beit knownthei Lamm-ES, BODEN. .pp e ,and .e

3ra-.1ere

tool willl be constructedfto operate/on-'the w01 sh andfforthe purposes .own is designed 'to i yeo he hammer comprisesv a hollow handle .54

nailinto the desired material.v The neck Gis preferablyformed llowand openon'the :under side as shown f sited material. l u.

.In using the hammer -it is gripped'and lswung in the usual manner, the 'stripper contactswith and is stoppedbythe material driven, a'nd the head' moves vsubdepending upon the thehand. Itisdesirable that the distance stripper be substana slidably attached to the' heed" 5` .bymea'ns ofthe tongue? and capableof4N is a stripper Shaving an aperture 9 exteinL mgtherethrough.v alined-with the aperture 9 in the stripper `is the driver 12 which. operates to drive thew Vnail through the aperture and-into the de grippedfin fromlzthis" center tothe bottom opening of the aperture 9*"in the tially constant for all positions of the 'strip-' per in order that therewill be no motionbetween the stripper and Athe board Orother tact vvith'the board` 'This is accomplished by arranging the-stripper or the aperture 9 '100 1n the stripper i at anp'. acute angleA to vthe' handle-.or preferably by causing the stripper vto'fnfiovein' anarc about 'thef swing center. v This' is. preferably v'accomplshed by forming* the: tongue'lj and .the driver 12 on the z de-'f fsiredarc;j Byfcausing-:the stripper .tomove 'inf-an" arc'. described, or' `-by yjoelIsingit. to

' lane'jatfan "acute @angle tol the'` hendlexrherep@tendency 0f .the stripperl to move relative f to" the board or other vmaf terial, Whe-nth? 1'leadis-movingltovvardthe .stripper and driving the mij.v -v 'l In automaticA hammers which have been Vdesigned heretofore, the head'and' stripper havev been arranged' at right angles to the handle, with the-result that thel head'end of 'the nail is bentfover as itis driven.' Thel present `construction causes the 'nail to be Aivvhich is compressed as the head moves topressed.

ward 'the stripper. The spring 13 lies'normally partly'within the hollow neck 6 and is moved farther into the neck asit is com- The nails to driven vare* arranged seratz'm in'a nail tape 14 which is arranged in the rail tape guide 15, which. se-f secured to the stripper andwhich is pivoted adjacent its rear end to the handle. The point ends of the nails extend downwardv from the guides and the stripper is provided with a longitudinal passage 16 for the nailtape and a longitudinal passage 17 for' the nail ends, which terminates at the aperture 9. The rear end of the handle isY open so that the successive tape strips may be readily inserted as the nails are used. The nails are fed successively into the aperture 9 by means of the pawl 18 arranged in the slot 19 in the stripper. The pawl 18 is arv ranged below the nail tape and is provided with a plurality of'teeth 21 which engage the bodies lof the leading nails. The pawl is reciprocated to advance the tape by means of the spring 22, one leg 23 of' which is secured to the strlpper and the other leg 24 f which is connected to the pawl 18. The leg 24 contactswith the lower edge of the head 5 and is so arranged that the leg 24 is moved backward toward the leg 23 as the head moves toward the stripper, causing a backward movementl of the 'pawl 18.V The pawl is pivotally attached to the lower end of leg 24 and is pressed against the nails by a spring 25 arranged at the 4pivotal point.

' The spring 25 has slight tension, so that as the pawl is moved backward, 'it is moved slightly about the pivot by engagement of the teeth thereon with the nails, so that the teeth pass and engage the succeeding nails. As the hammer is lifted, the head moves awayfrom the stripper allowing the spring 22 to expand, moving the pawl forward, and

'thereby bringing the leading nail into the aperture 9, from which it is driven on the next blow of the hammer. Means are also provided for preventing a backward movement of the nail tape when the pawl 18 is moving backward. Pivotally attached to the stripper is a lever 26 which is normally pressed against the stripper by the spring 27. The lever is provided with an inturned end or, blade28 which engages in a slot in leading nail in the aperture. The slot129 in which the blade 28 engages, 'preferablyy extends transversely of the stripper from: face to face.- That portion of the slot lying on the opposite side of the stripper from the lever 26', is partly 'closed by a bridge 31 vand the edge ofgthe blade 28 is provided with a notch 32 which overlies said bridge. The bridge prevents the blade from accidentally driving a 1nail transversely into the slot 29,

,should the` nail occur directly opposite the s10t. The lever 26 is also provided with a plurality of pins 33 which engage the succeeding nails in the tape andl lockthe tape imposition. .'Meansare provided for movlngthe bladeand pins out of contact with the nails duringthe'forward movement of the'pawl, so that the pawl "may operate to advance thetape.

It will be seenthat the slot or passage 17 provides a free opening rearward of the driving aperture 9, when the blade 28 is withdrawn, but when the blade occupies the slot 29 the leading nail is locked in the aperture 9, in true alinement with the driver, and at the' ultimatepoint from which it is driven outof the stripper. v It follows from this construction that when the driver strikes the nail the latter will be driven true, and cannot be bent or deflected from the path of travel of the driver. I- consider this a very important feature of my invention'.

Arranged on the head 5 is a latch 34 provided with a projection 35 which coperates with the bent arm 36 on the lever 26, to

'move the free end .of the lever away from projection 35, and as a blow is struck and the head moves toward the stripper, the arm 36 forces the projection 35 upward. On account of the curvature of the arm 36 4and the pivotal mounting of the latch 34, the arm disengages the projection 35 as the head 5 approaches the stripper, allowing the `latch t0 fall to its normal position. The projection, with the latch in this position, lies in the path of the bent arm 36 on its downward movement, so that as the head moves away from the stripper, after the blow has been struck, the arm engages the projection causing the blade 28 and the pins 33 to be removed from the path of the nails',v

thereby allowing themto be fed forward by I* t aai-@amesa-e paiera., inalterata ma ms sjnap'bank into the path` of" the, nai-ls'. l l'h'egparts desc'ribedd'v lare preferably so' ,timed into position to bex'drivenfyImmediately 'l thereafter the armr26 will beitripped tojlock this nail'in alinement-'withthedriver. f lheu driver 12 drives the nails out of the tape14,

and as fthe' successive: nails 'are 'djriven the l vstripped tape is fed out at the end of the strlpper.

- providedfor locking the. stripper in any position of its movement with .relationto the head. -Su'ch I'neans lare advisable 1n instanceswhere the-nail is not driven vcolnpletely into the material on the first blow and it is neces# sary to strike it several times to dr1ve11t tongue 7 'is`. 'provi ded vwith a .teeth or arrackl 42 which is adapted tobe engaged by 'a pawl` 4 3 'pivoted in the head Pivotally attached to thepawljis a link 44 45 additional blows are being applied to a nail l .andthuspreventsthe aperture 9 from'becoming jammed. The rear face of the plurality 4i ofv which extends backwardto al position adjacent the handle 'at which point Ait is pivoted` i, to a lever 4`5 pivoted to the :handleor neck. "T The leverf45 -is\provided with an. ear 46,'

ily .engaged by the linger' of' .the operative 'so that the locking mechanisml is readily operated, and'in no manner interwhich is read feres with the manipulation ofthe hammer.v By raising .or pulling with the finger on the I to 1 e tion to' ybe .operated 3 5 ear 46, the pawl is dlsengaged from the rack as 5 tionA to thev head. Means are also provided andthe vstripper is' free to move with rela- [f 'for locking `the 1ocking me chanism in inop-l erative position;

leve'rl 45,. is af latch 47. which is adapted 5to 1 14 engage aprojection 48 on the lever and hold it in 1ts-v retracted position. f-The latch" is pro!v .Arranged adj acent the j v'ided with 'attrig'ger y49 arranged onv the'op convenient posi-' by the thumb ofv the 45 is normally'- pressed posite sfide ofthe handle in operativa. The lever king e'ngagen'ieiit` lever is pulled backwardryv-The s encircling the pivot ofthe'latchmayral'so dleeaiad' attached thereto, a 'curved driver. i

vFixed mfsaid` head sligalily 'connecting said head and setz'm. to'said stripper in alinement with said driver. v home. An important'functionpof this'locking means Withthe present'construction is that it may be employed to hold thefstripper. i f' and headfin a'plurality of-different positions s of Vseparation,dependin' upon the degree' "off'pro'jectionfof incomp etely driven hails, and yet .act to preventseparationipf these. parts 4'to the ?'point'jwhere the feeding pavvll Y Willbe actuated. "This insures that the nail-' l carrying tape will not be advanced. while V'the passage 'of a nail ing part of the nail stripped 'backward each other, and to move the pawl vforward as the head head" attached thereto,

operateftepresstheflatch-i1oyvnward, 1

. Inra-'n automatic swing hammer,l

@han

I I andfprojecting therefroi'n,` v a stripper having anelon'gated curved apenI vSaid dr'ver, 'and' a curved tongue'V concentric w1th said driver fand stripper. aperture" and f stripper."v yn an=automati^c hammer constructed -forjfree v swingingmovements by the operar tor-fte, drive V.nai1s,a handle, a head attached thereto,a driver fixed in said head, the lower end of the driver :lying at an acute angle to said handle,a stripper coperating with said driverand'lying normally at an acute angle to said handle, .and means for feeding nails 3. Inl an-.autom'atie hammer,a handle, a head attached thereto, a driver fixed in 'said head, astripper coperating with said driver andhaving an aperture therethrough vfor tape, said driver. op-

eitmgto' 'drivezthe leading'nailfrom said head attached thereto, a .driver xe'd" in-I said head, a stripper coperating with'saiddriver andl having an aperture therethrough for' the passage 4of anail tape, said driver operating to drive the leading nail from the tape, means for vadvancing tlie tape, and a blade on said head. arranged to sever-theprojectta' e.

5. In anautomati'c hammer, handle,fa

head 'attachedtheretma driver-zied in said head, a vsliding stripper guided'nsaid head and having an aperture alined with said driver, a nail, tape-*guide on 'said stripper,l`

. a pawlarrangedto'engage the nails in said tape, and aspring engaging said pawland said head and arranged .tomove'the pawl asthe headv and stripper approach and stripper are. separated from leach other.-

'. 6.In fan automatic hammer, `a handle, a

a driver fixed in vsaid head, a vsliding stripperguided in said'head andghaving an aperture alined wfith said driver, a. nail tape -guide on said stripper, f agpawl arranged toadvane'e said tape to present the nails se'rz'atf'm to lsaid driver, ine/ans 130 4for locking` the vtape in position during the backward movement of said pawl, and a spring 'engaging said awl and said head and arrange to move t e pawl backward as the head' and stripper approach each other, and' to move the pawl forward as the head and stripper are separated from each other.

7. In anl automatic hammer, a handleta head attached thereto, a driver xed in sald head, a movable stripper coperating w1th said driver, a nail tape guide in said stripper, means for advancing the tape to present the nails serz'atim to saiddriver, a lever pivoted to said stripper, means thereon arranged to engage the nails in said tape, a bent arm on said lever, and a latch on said head arranged to be engaged by said arm and operating to withdraw the nail engag-` ing means on the upward movement of the head with relation to the stripper.

8. In an automatic hammer, a head, a driver fixed therein, a stripper coperating with said driver, a nail tape guide on said stripper, areciprocating pawl for advancing said tape to present the nails seriatz'm to said driver, meansfor locking said nails in poj sition during the backward movement of the pawl and for releasing said nails during the forward movement of the pawl, said means comprising a lever pivotally attached to the stripper, pins on said lever arranged to lie between the successive nails, a bent arm on said lever, and a latch on said head coperat` of the pawl.

ing with said arm to cause the pins to be withdrawn during the forward movement 9. In an automatic hammer, a driver, a stripper coperating therewith and having an aperture alined with the driver and a transverse aperture arranged adjacent to said first named aperture and extending through both walls of the stripper near the discharge end thereof, and having further a' nail passage terminating at said first named aperture, a notched blade arranged for movement in said transverse aperture to separate said first named aperture from the i nail passage and to lock the nails at the driving point, and a lbridge in said transverse aperture in the wall toward which the blade moves inwardly and arranged to be engaged Aby a notch in the end of said blade.

' lincassa head attached thereto, a stripper coperating with said head, means for feedlnga strip of nails, actuated by the separatlng movement of the head and stripper, a tongue arranged to uide said stripper with respect to said hea said' tongue being at tached to said stripper and slidably engaging said head, a rack on said tongue, a pawl in said head arranged to engage said rack, said parts 'acting to. lock the head and strip- -per against separation to the point where said feeding means will be actuated, a lever arranged adjacent lsaid handle, and-means a connecting said lever with said pawl.

12. In an automatic hammer, a handle, a head attached thereto, a tongue slidablein said head, a stripper attached to said tongue, a rack on said tongue, a pawl'arranged to acv engage said rack, a lever arranged adjacent said handle and connected to sald pawl, and means arranged adjacent the handle for locking the pawl in inoperative position.

13. In an automatic hammer, a handle, a

head attached thereto, 'a stripper slidably connected with said head, a rack associated with said stripper, a pawl in said head arranged to engage said rack, a lever arranged adjacent the handle for moving said pawl, anda latch for locking said lever in its l inoperative position.

14. In anautomatic hammer, a frame, a head attached thereto and carrying a driver, a nail carrying'member movable relatively to the head, yielding means for separating said head and member, means actuated upon the separation of said parts to advancel a strip of nails, and locking means for arresting the separation -of said parts at a plurality of points.

15. In an automatic hammer, a frame, a

a stripper movable relatively to the head, yielding means for separating said head and stripper, means actuated upon the separation of said parts to feed a strip of nails, and locking means acting automatically to hold the head and stripper in different positions of separation and to prevent suflicient separation to cause the advance of the nail strip.

16.*In an automatic hammer, av frame, a head attached thereto land carrying a driver, a nail carryin member movable relatively head attached thereto and carrying a driver, j

to the head, yielding means for separating 'said head and member, means actuated upon the separation of said parts to feed a strip of nails, locking means acting automatically'to arrest the separation of said parts at a plurality of points, and manual means for rendering said locking'means operative or inoperative, at will.

17. In an' automatic hammer, a frame, a

head attached thereto and carrying a driver,

a nail strip carrying Amember movable relatively to said head and having a driver ap- IIC erture, means actuated upon the separation of said head and member to advance the nail strip and feed successive nails under the driver, and means for locking the nails in position to be driven through said aperture comprising a blade and actuating mechanism constructed and arranged to hold the blade in locking position during the driving stroke but to remove it from such position on the reverse stroke during the advance of the nail strip.

1S. In an Aautomatic hammer, a frame, a head attached thereto and carrying a driver, a stripper movably connected to the frame, means actuated by the separation of the head and stripper to feed nails into driving position, a lock for holding successive nails in such position comprising a lever pivoted to the stripper and carrying a blade, and actuating mechanism for said lock.

19. In anautomatic hammer, a handle, a head carrying a driver, a stripper movable toward and from said head, means actuated upon the separation of said parts to advance a strip of nails for positioning successive nails in alinement with the driver, and locking means for limiting the separation of said head and stripper to prevent the operation of said nail stripradvancing means.

20. I-n an automatic hammer, the combination of a handle arranged to be swung by the operator, a head attached thereto, a curved driver fixed in said head, a stripper coperating with said' driver, and having a curved aperture. to receive said driver and a nail-tape slot entering said aperture transversely, said stripper being arranged to move relatively to the driver in an arc whose center coincides substantially with that about which the hammer is swung.

21. In an automatic swing hammer, the combination of a handle, a head attached thereto, a .curved driver Xed in said head a stripper having a curved aperture alined with said driver and a nail-strip slot entering said aperture transversely, said stripper being arranged for movementrelatively to the driver, and a feeding mechanism for a strip of nails actuated by the relativ`\ movement of the stripper and driver, said movement being in an arc whose center coincides substantially with that about which the hammer is swung by the operator to drive nails.

22. In an automatic swing hammer, a handle, a head attached thereto, a curved driver xed to said head, a stripper, cooperating with said driver, and a curved tongue concentric with said driver slidably connecting said head and stripper, the stripper being arranged to move relatively to the 'driver in an arc whose center coincides substantially with that about which the hammer moves as it is swung by the operator.

23. An automatic hammer having, in combination, a handle constructed to be grasped by the operator while the hammer is swung freely toward and from the work, a head attached to the handle, a curved driver afiiXed to said head, and a stripper having a curved aperture to receive said driver and supported for movement relatively to the driver in an arc whose centercoincides substantially with that about which the hammer is swung, said driver and aperture being arranged at an acute angle to that part of the handle which is grasped by the operator.

24. An automatic hammer having, in combination, a handle constructed to begrasped by the operator while the hammer is swung freely toward and from the Work, a head attached to the handle, a driver attached to said head and arranged' at an acute angle to the portion of the handle which .is grasped by the operator, a stripper arranged for movement relatively to the driver, anda feedin mechanism for a strip of nails actuatedgb per and driver, said movement being in an arc whose center coincides substantially withy the relative movement of the stripf that about which the hammer is swung by the operator to drive nails.

In testimony whereof, I have hereuntoset myA hand at San Francisco, California, this 6th day of June, 1913.

CLARENCE S. BODEN. In presence of- H. G. PRos'r, M. Lr. Comm. 

